Baltimore’s Jim Palmer gives up a grand slam – but it is in the minors. Sent to Rochester (International League) to rehabilitate from back problems, Rochester manager Earl Weaver starts the 21-year-old against Buffalo, in a game moved to Niagara Falls because of racial disturbances on Buffalo’s east side. Palmer is given a 7 – 0 lead, but the Bisons score five runs in the 3rd, four coming home on a grand slam by Johnny Bench. Rochester hangs on to win, 10 – 8.

On july 1, 1967 Baltimore’s Jim Palmer gives up a grand slam – but it is in the minors. Sent to Rochester (International League) to rehabilitate from back problems, Rochester manager Earl Weaver starts the 21-year-old against Buffalo, in a game moved to Niagara Falls because of racial disturbances on Buffalo’s east side. Palmer is given a 7 – 0 lead, but the Bisons score five runs in the 3rd, four coming home on a grand slam by Johnny Bench. Rochester hangs on to win, 10 – 8.

Source
Baseball Reference July 1